02452nas a2200469   4500000000100000000000100001008004100002653001600043653000900059653002200068653002900090653003400119653003000153653001000183653001100193653001800204653002400222653002100246653002600267653001200293653001000305653002300315653001700338653000900355653001700364653001100381653002600392653001600418100002500434700002400459700002000483700001900503700001900522700002000541700002000561245012400581856014200705300001200847490000700859520109600866022002001962                                       d10aDegradation10aDyes10aExperimental test10aHyper-spectral imageries10aIntangible cultural heritages10aLED μ-spectrofluorimetry10aLight10aLining10aModel samples10aNatural degradation10aPhotodegradation10aPhotodegradation rate10aRemoval10aShape10aSpectrofluorimetry10aSpectroscopy10aWool10acolour chart10afading10ahyperspectral imaging10ayellow dyes1 aHortense de La Codre1 aCharlotte Marembert1 aPauline Claisse1 aFloreal Daniel1 aRemy Chapoulie1 aLaurent Servant1 aAurelie Mounier00aNon-invasive characterization of yellow dyes in tapestries of the 18th century: Influence of composition on degradation  uhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85101942504&doi=10.1002%2fcol.22646&partnerID=40&md5=e9e554e1b61165b382c770f376102211  a613-6220 v463 aAubusson (France) has been inscribed on the List of Intangible Cultural Heritage of Humanity by UNESCO since 2009 for its centuries-old tradition for the art of tapestry. The present study concerns one of these “Grand teint” tapestries, a Verdure with Count von Brühl s coat of arms (18th C.), characterized by very high-quality dyeing and fine weaving. The restoration in progress allowed the removal of the lining of the back, which protected the colour from light. Hyperspectral imagery and μ-spectrofluorimetry made on each side of the tapestry showed the influence of natural degradation of dyes. Experimental tests carried out model samples artificially aged, allowed us a better understanding of these observations. The fibers (silk and wool) and dyes (weld, …) were identified and the roles of alum and tartar as mordants were questioned. Our work revealed the action of the recipe on the photodegradation rate and the effect of aging on the spectra s shape for yellow dyes and the disappearance of some compounds, such as chlorophyll “a,” as a marker of the degradation.  a03612317 (ISSN)